Years ago, I worked in the IT department at a university that brought in an MDM for accessing work email on personal devices with a policy of wiping the phone if you got your unlock code wrong 3 times. I refused to use it on my personal device and told the head of the department that it was far too risky as you could accidentally do this with the phone in your pocket. He disagreed, but less than a week later, this exact thing happened to him, got his unlock wrong 3 times, phone wiped, no backup done. He still refused to change the policy even with the inconvenience it caused him. I just laughed.

"you're welcome to try"

hands over my brain-dead flip phone with no 'app' capability

I used to have Teams and Outlook on my phone, so I was accessible for work at almost any time. I know a lot of people think that's dumb, but I was an hourly employee so I never minded the occasional work ping after hours, since I didn't mind getting paid to reply with a few sentences from my couch. It worked out well for both me and my company.

Then they decided to make MDM mandatory on your phone to access Teams and Outlook. I declined the install and removed both apps from my phone. Now I can easily miss IMs for weeks at a time if I don't open a 2nd laptop to check them. I'm more disconnected than I've ever been, which is probably better for my mental health. I don't bill as much as I used to, but that's fine for me.

I eventually caved and installed stuff on a Pixel 1.

If they wanted a phone with security updates they would have given me one.

The solution for their use should have been standard TOTP and/or yubikey. But apparently some vendor came in with a fancy PowerPoint for their proprietary project.

You're fired